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2017 | 131 | 4 | 869-871
Article title

Exchange Bias Effect in NdFeO₃ System of Nanoparticles

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Abstracts
EN
We study the effect of nanometric size on the crystal structure, magnetic environment of iron and magnetization in NdFeO₃ system of nanoparticles. The average particle size of NdFeO₃ nanoparticles increases with annealing at 600°C from about 15 nm to 40 nm. The smallest particles on annealed sample have size approximately 30 nm and typically have character of single crystalline samples. All samples adopt orthorhombic crystal structure, space group Pnma with lattice parameters a =5.5817 Å, b=7.7663 Å and c =5.456 Å for as prepared sample. The presence of superparamagnetic particles was indicated by the Mössbauer measurements. The reduction of dimensionality induces a decrease of T_{N1} from 691 K to 544 K. The shift of magnetic hysteresis loop in vertical and horizontal direction was observed at low temperatures after cooling in magnetic field. We attribute such behaviour to exchange bias effect and discuss in the frame of core-shell model.
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Contributors
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
  • P.J. Šafárik University, Faculty of Science, Košice, Slovak Republic
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • P.J. Šafárik University, Faculty of Science, Košice, Slovak Republic
author
  • The Vinca Institute, University of Belgrade, 11001 Belgrade, Serbia
author
  • The Vinca Institute, University of Belgrade, 11001 Belgrade, Serbia
author
  • Institute of Physics of Materials, ASCR, Zizkova 22, Brno, Czech Republic
author
  • MPM & FGG, Jadranska 19, 1000 Ljubljana, Slovenia
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Document Type
Publication order reference
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bwmeta1.element.bwnjournal-article-appv131n4085kz
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